Quantum DXi4701, Руководство пользователя

Страница: 43 / 440

Chapter 1: DXi4701 System Description
Hard Drive Storage
Quantum DXi4701 User’s Guide 17
is created at 200 GB, then it will be presented as storing 200 GB of
native data.
Creating smaller sized media is preferred, for example 50 GB or 100 GB,
as it allows a virtual tape cartridge to be completely filled even when
backing up smaller data sets. Smaller sized media also aids the transfer
of data from virtual to physical tape platforms. Once again, virtual tape
cartridge size will depend on the backup application in use.
It is important to note that the design of the DXi will not allow a virtual
tape cartridge to be written to it if its size is larger than the amount of
free space available on the DXi. For example, if you have a virtual tape
cartridge size of 400 GB but only 300 GB of free space is available on the
DXi, the backup will fail when attempting to write data to the virtual
tape cartridge. As a result, smaller virtual tape cartridge sizes are better.
Remember, the DXi system is always cautious of being filled up so that
the integrity of stored data is not compromised.
Network Attached
Storage (NAS)
The DXi4701 system has the ability to serve as a NAS backup system (see
Figure 6 ) where the following protocols are supported:
• CIFS Protocol
• NFS Protocol
CIFS Protocol
The CIFS (Common Internet File System) protocol defines a standard for
remote file access from many computers at a time in Windows
environments. This protocol allows users with different platforms to
share files without installing additional software.
Active Directory Support
The DXi4701 supports ADS (Active Directory Services) as well as ACLs
(Access Control Lists). This provides the following benefits:
•
Compatibility with CIFS domains
- NAS shares are able to join CIFS
domains and use domain authentication.
•
Precise control of file system permissions
- Administrators can
specify which users and groups can perform what actions.